Keyboard mechanism



J. R. :KBYBOARD IBCHANISI Filed Aug. 15, 192; I ZSheets-Shoot 1 March 24, 1925.

Jk R. ROGERS KEYBOARD MECHANISM Filed Aug. 15, 1923 2 Sheds-Shed 2 x w 5% R v Q- WN VENTQJR ATTZRNEYs the rubber-covered Patented Mar. 24, 1925.

UNITED STATES,

PATENT 1 OFFICE.

JOHN R. ROGERS, OF BROOKLYN, NEW YORK, ASSIGNOR TO -MERGENTHALER LINO- TYPE COMPANY, A CORPORATION OF NEW YORK. 5

KEYBOARD MECHANISM.

Application filed August 15, 1923. Serial No. 657,473.

To all whom it may concern:

Be it known that I, JOHN It. RoeERs, a

citizen of the United States, residing at roll. The pivoted yokes are heldnormally with their cams at rest and out of contact with the rubber-covered roll and are released by the manipulation of finger keys,

which permit the cams to fall into engagement with the driving roll and be rotated thereby to raise the yokes and operate the escapements. In practice, the life of the rubber covered'rolls is comparatively short by reason of wear and other deteriorating influences, and hence it is necessary at times to remove the worn rolls andsubstitute new ones, involving considerable expense and occasioning much inconvenience and loss of time. In addition, the wear of the rolls oftentimes results in the failure of the 'es capements to respond to the actuation of the finger keys, due to the insufficient raising of the cam yokes. Furthermore, and without regard to the question of wear, considerable slippage rolls during their driving engagement, and especially when oil finds its way onto the rolls, resulting in a i'lelayed actuation of the matrix-releasing es capements and thus giving rise to transpositions of matrices in the composed line.

The present invention is intended to do away with the above mentioned rubber-covered rolls contemplates the use of metal rolls for driving the rotary cams or eccentrics. In pr0- viding for a driving engagement between these parts, the rolls are formed in their takes place between the cams and and the attendant objections, and

outer surface with a series of annular V- shaped grooves, and the rotary cams or ec centrics are formed with correspondingly shaped peripheral ribs to engage in said grooves. As the parts are thus formed, when the eccentrics are dropped into engagement With the rolls, the rotary motion of the latter will be imparted immediately to the former and the two caused to rotate in unison, the frictional engagement of their V-surfaces being great enough to ensure-this result. In practice, the amount of wear is I quite negligible, although such as takes place is fully compensated for by thenature of the driving engagement. other improvements will be fully set forth in the detailed description to follow.

Referring to the drawings:

Fig. 1 is a vertical section taken through the keyboard mechanism of a linotype ma chine equipped with the present improvements; f

Fig. 2 is a similar view showing one of the cams or, eccentrics in operation and with the corresponding yoke in its raised position; i I

Fig. 3 is anrelevation of one of the power driven rolls detached;

Fig. t is a sectlon taken on the line 4ct of Fig. 3;

Fig. 5 1s a side view of one ofthe improved cams or eccentrics detached;

These and Fig. 6 is a transverse section taken onthe 7 line 6-6 of Fig. 5;

Fig. 7 is anenlarged detail view, showing one of the cams or eccentrics out of en gagement with the power drlven roll;

Fig. 8 is a similar view, showing said cam or eccentric in engagement with the roll;

of Fig. 1; and

Figs. 10 and 1]. illustrate a modification,

Fig. 11 being a section taken on the line 11l1 of Fig. 10.

The matrix-releasing escapements (not shown) are actuated by a series of vertical reeds A, which 1n turn are operated by Fig. 9 1s a section taken on the line 9&9

horizontally disposed yo-kes or levers B, ar- I rangedas customary in two banks or series and with the inner ends in position to engage the reeds. At their opposite ends, the yokes are supported upon transverse pivot formed only with the V-shaped grooves D which of course engage only the inclined or beveled surfaces of the ribs C When the cam yokes are tripped and the parts set in motion, it is desirable that the trip dogs E be restored promptly totheir original position in order .to arrest the descending yokes after they have operated the reason of its U-shaped form, the piece J will allow the arresting pin C 0n the associated cam to pass through it without interference. I

The foregoing improvements have been shown merely in preferred form and by way of example, and as applied to a mechanism of the class stated, but obviously many modifications and alterations'therein and in their mode of application may. be made without departing from the spirit of the invention. For instance, the improvements might be applied to a keyboard 'mechanism' of a machine other than the linot-ype and still function substantially in the mannerim dicated. It should be understood, therefore, that the invention is not limited to any specific form or embodiment, except in so far as such limitations are set forth in the claims. Having thus descrlbed my -invent1on,;its construction and mode of operation, what I claim and desire to secure by Letters Patent of the United States, is as follows:

1. In a mechanism of the class described, the combination with a rotary driving element and a rotary driven element, the two being mutually formed for lateral driving engagement, of an actuating member on which the driven element is journalled and which is operated thereby, and means controlling the engagement and disengagement of said driven element with and from the driving element.

2. In a mechanism of the class described, the combination with'a rotary driving ele ment and a rotary driven element, one formed with an annular groove and the other formed lo engage the sides of said groove, of an actuating member on which the driven element is journalled and which is operated thereby, and means controlling the engagen'ient and disengagement of said driven element with and from the driving element.

3. In a mechanism of the class described, the combination with a rotary driving element and a rotary driven element, one formed with an annular V-shaped groove and the other with a V-shaped rib to engage in said groove, of an actuating mem ber on which the driven element isjournalled and which is operated thereby, and means controlling the engagement and disengagement of the driven element with and from the driving element.

4. In a mechanism of the class described, the combinationof a rotary driving element formed with an annular V-shaped groove and with an annular clearance chan\ nel opening into said groove at the apex thereof, a rotary driven element formed to engage the sides of said groove, an actuating member on which the driven element is journalled, and means controlling the engagement and disengagement of the driven element with and from the driving element, the said means including an arresting pin extending outwardly from the periphery of the driven element and adaptedto travel in the clearance channel of the driving ele- Y ment when said parts are in driving engagement with each other.

5. In a mechanism of the class described, the combination of a rotary driving element formed with an annularv .V-shaped groove,a rotary circular driven element formed a engage the sides of said groove,

'a pivoted actuating member on which the.

driven element is j-ournalled and mounted .to yield atits pivoted end, andmeans controlling the engagement and dlsengagementof the driven element with and from the driving element. v

6. Ina mechanism of the classdescribed, the combination of a rotary driving element formed with an annular clearance channel, a rotary driven element, and means ,controlling the engagement and disengagement of said elements with and from each other, the said means including an arrest ing pin extending outwardly from the peripheral edge of the driven element and adapted to travel in'the clearance channel of the driving element when these parts are in driving engagement.

7. In a keyboard mechanism of the linotype class, the combination of a power driven roll formed in its'outer surface with a series of annular V-shaped grooves, a corresponding series of rotary cams formed with V-shaped peripheral ribs to engage in said grooves, pivoted yokes or levers on which the rotary cams are jonrnalled, and means controlling the engagement and disengage ment of the cams with and from the power driven roll.

8. In atkeyboard mechanism of the linotype class, the comblnation of a series of pivoted yokes or levers, rotary cams journalled thereon and formed with V-shaped peripheral ribs, a power driven roll formed in its outer surface with a corresponding,

series of annular V-shaped grooves wherein the cam rlbs engage, and also formed with.

withtlie cern ydkes'or leversfafid key conbei 'ngf"mutfiztlljr foi'rn'e'dfer lateral driving d ectnzlting' sltdes'eonneetedto thetrip' engdgeineiitfand the driven eleineht hzifvi'ng 7 afiwtrlfest ing shenld'ei located at its outer' S). Ke'yb'ozird'meehenlslnesspecifidin" piiphelal edge, of an actuatingmember' rotaffca'lns therein recited "areof cireuluf tlip' 1n ea ns'eopefating withtheactuating I. "H" l V: l V 5U" l folfllfktfld tll ztt' the PIVOtG'Cl yokes 01 leyers membey to hold the drlven element normal ol'nwvlnch 'they"are mount'edhr'e' arranged 'ly out of' engagement wlth the drlvmg ele tqyield' atth'eif piveted endsyfof thepuf- In ent, and afistop device redapted'td engage pose desc'fibedt 103111361 ke board ineehan isni 0f the linoand hold the 'lattei"ageinst idtzitibn.

type ela ssgfhecombinatimfeta otver sides ofsaid-grebve's'; pivotedyel g-es01""levefs peripheral Tiles, said ribs being termed in on hi h th tary'cerns tirej0ufne1led,:and their outer edges with ntches 01 recesses me'zi'ns-e ntr llhdg' the engagement-and' dis t6 pi'tfiv'ide arresting shoulders fo'r said Cam's, en'gd'genle nt of the cams Witl'r'and frdmth apewer'drii enn'oll fOf eCl' 'Q Outer poWer clriven'l ollf face with? corresponding series of annular 11 rInakeyh0afd rneehan-islnof the-line v' slm'ped"grooveswherein the cam-ribs en type" class; the" combination of a power" g%1g,-a*st'0p bar arran ed toenga'ge the ardriven roll, a rotdfy csun"adapted tdengage resting shoulders of the cams, trip dogs as therewith, a pivoted yoke oflever on wlfieh' O'Ci tdWith the yOkes o! levers, and the fcam isjourn alled, efke'y cqntrollled'trjpkey-Controlledactuating-slides connected t6 dog' associated'withth'eham oke; and a tli'etri db'gsi U-shaped pieceettehed"td the fealn yoke at "Ifihanislfi'as specifigd Ola-i111 its free end and adz ptedkluiing the ep'era characterized by the 'fa'ctthat the rotary tion thereofto'engage'thetrip (legend redriven elements or cams therein reeited 'are tb it t v t 0mm positlo'n. f01n1ed"1n"the1rontenpenpheml edges Wll'll claim 8, 'chtrfi c'te'f 'ized b-y 'thefact that the sh'onldefs for engagement with a stop bar, as pivoted Ca'm' yokes' areprovidedet their h P 1 3 d b free ends with substantially U-shapedpiees I te'stlfnony"where0f,' I have'affixed my adapted, during the bpe'retion'of the yokes, lgnltnie here'te.

to engage the trip dogs:and' restOrethe1n to their normal positidn, the said U-shapecT JOHN'R. ROGERS;'

the arresting shbuflder efthedriiren elernent' Y I I 145111 a keybeard lneehanisin ofthe linoa driven ro'll formefdin its'out'r'surfaeewith type classthe combmation of a series of 

